Which color is used for horizontal cabling in this color scheme?

• A. Green
• B. Blue
• C. Purple
• D. Orange

Answer: (B)

Color coding in a structured cabling plan helps you quickly identify what part of the network a cable serves. Horizontal cabling is the run that connects user outlets to the main distribution area on the same floor. In this color scheme, that horizontal portion is colored blue, so you can tell at a glance that a blue cable is part of the horizontal link rather than a backbone or a different type of cable. This visual cue aids installation, labeling, and future troubleshooting, ensuring cables are routed and terminated in the correct place. The other colors are used for other parts of the plant in this scheme, so they would not be used to represent horizontal cabling.